So I'm sure some of these are really easy to get your first playthrough since there are so many 'bad' endings, but I just really wanted to help out because no site has a walkthrough for this game. X3 SO here it is, the complete walkthrough on ALL the endings which I personally tested to make sure they work!!
I compiled a lot of the information here or found them out for myselt, so I just thought i'd give a full out walkthrough for those who can't get that ONE ending that isn't listed, so thank you all for helping me acheive these endings too!!! They're also in order of how they appear on the games list. ENJOY!!

Path of Corpses:
(Either choice)
Yeah, Youâ€™re rightâ€¦.

Hand Of Doom:
(Either choice)
Donâ€™t worryâ€¦
(either choice)
I have to go to the bathroom
Oh well
Scream

Wet Footsteps:
(Either choice)
Donâ€™t worryâ€¦
(either choice)
I have to go to the bathroom
Oh well
Run

Voice From The Dark:
(either choice)
Donâ€™t worryâ€¦
(either choice)
Letâ€™s get out of here
Go to the gym
(either choice)
Go to the Storeroom

Bottom of the pool:
(either choice)
Donâ€™t worryâ€¦
(either choice)
Letâ€™s get out of here
Look outside
(either choice)
Letâ€™s have a look around

Alone:
Hey, I know...
Don't worry
Did you see that?
Let's get out of here.
Go to the gym
I can't accept this.
Go to the stage wings
I can't take him with me...
Why did I run away?
An illusion
Call the police
Answer it
Just stay put
Survival
Hey I knowâ€¦
Donâ€™t worry
Did you see that
Letâ€™s get out of here
Gym
Alright
Go to the stage wings
I wonâ€™t leave you
Why did I leave him
Call the police
Answer it
Stay put

Grim Reaper:
Ask his name
Don't worry
Did you see that?
Let's get out of here
Look outside
I can't accept this.
Right, let's go.
I can't just leave him
Why did I run away?
An illusion
Look for something
Band Room
No.

The Lurking Hand:
(either choice)
Donâ€™t worry
Did you see that?
Letâ€™s get out of here
Gym
Alright
I canâ€™t just leave him
Why did I run away?
(either choice)
Look for something
Band room
Okay.
Look for an escape route.

Into the Darkness:
Ask his name
Don't worry
Did you see that?
Let's get out of here
Look outside
I canâ€™t accept thisâ€¦
Right, let's go.
I can't take him with me...
Why did I run away?
An illusion
Look for something
Back to the classroom
Take it
Water fountain
Library
Go in
Don't turn around
Band Room
No.
Look for Ozawa

The Lost Soul:
Ask his name
Don't worry...
(either choice)
Let's get out of here
Gym
(either choice)
Go to the stage wings
I can't leave him here
I wonder what happened to Ozawa...
He must be dead
(either choice)
Look for something
Classroom
Leave it
Band room
Okay
Look for Ozawa

Surelyâ€¦.:
Hey I know...
Don't worry...
Nothing...
I have to go to bathroom
Leave the Bathroom
Go to the Gym
Alright...
Go to the Stage Wings
I can't just leave him
I wonder what's happened to Ozawa?
I know he's still alive
Something otherworldly
Call for police
Don't Answer It
Look for Something
Back to Classroom
Leave it
Water Fountain
Library
Go in
Don't Turn Around
Band room
No.

Thank You:
Hey I know...
Don't worry
(either choice)
Let's get out of here
Gym
Alright
Go to the stage wings
I can't leave him...
Why did I leave him...
He must still be alive
Look for something
Go to the band room
(either choice)
Search for Ozawa

Night of the Forget-me-nots:
Hey I know...
Don't worry
(either choice)
Let's get out of here
Gym
Alright
Go to the stage wings
I can't leave him...
Why did I leave him...
He must still be alive
Look for something
Classroom
Pick up the yearbook
Go to the band room
(either choice)
Search for Ozawa